Highchair



FIG. 1 is a perspective view of the highchair embodying our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevation view of the highchair, the left side view being the mirror image thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a highchair, as shown and described. 